[MacPorts] #68343: ffmpeg configure fails, clang unable to create executables

[MacPorts]

#68343: ffmpeg configure fails, clang unable to create executables
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  Reporter:  ShadSterling  |      Owner:  (none)
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.8.1
Resolution:                |   Keywords:
      Port:  ffmpeg        |
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Comment (by ryandesign):

 Can you locate a config.log file anywhere within `$(port work ffmpeg)`? If
 so, please attach it.

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Ticket URL: <https://trac.macports.org/ticket/68343#comment:1>
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